Ayşe Incesu Dokumaci, Fatih Özkan Alkurt, Lulu Wang, Muharrem Karaaslan
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引用次数: 0
Abstract
The radio frequency (RF) energy harvesting system collects electromagnetic energy that is freely propagating in the environment to charge low-power devices. In this study, we propose a novel voltage rectifier circuit based on a metamaterial absorber. Radio frequency energy in the 2.4 GHz ISM band is harvested from the environment by a metamaterial absorber and converted into direct current (DC) energy in a rectifier circuit. First, a high-efficiency metamaterial absorber of size 34 mm x 34 mm x 1.6 mm is designed on an FR4 substrate, followed by the design of a voltage rectifier circuit. The metamaterial absorber operates in the 2.4 GHz ISM band and is designed using a Finite Integration Technique (FIT) based simulation program that provides parametric and genetic algorithm tools. The design achieves a Reflection Coefficient \(\:\left({\text{S}}_{11}\right)\) of -26 dB and an absorption value of 99% at a working frequency of 2.4 GHz, independent of polarization direction. The voltage rectifier circuit is designed using Advanced Design System (ADS) software, and it achieves an efficiency of 73% for 5 dBm input power at 2.4 GHz. The designed metamaterial absorber structure and rectification circuit have been fabricated in the laboratory, and the simulation and fabrication results are consistent. The energy harvesting system presented in this study can generate electrical energy to power low-power Internet of Things (IoT) devices at a voltage of 1.9 V DC.
射频(RF)能量收集系统收集在环境中自由传播的电磁能,为低功率设备充电。在这项研究中,我们提出了一种基于超材料吸收体的新型电压整流电路。2.4 GHz ISM频段的射频能量通过超材料吸收器从环境中收集,并在整流电路中转换为直流(DC)能量。首先,在FR4基板上设计了尺寸为34 mm x 34 mm x 1.6 mm的高效超材料吸收器,然后设计了电压整流电路。超材料吸收器工作在2.4 GHz ISM频段,并使用基于有限积分技术(FIT)的仿真程序进行设计,该程序提供参数化和遗传算法工具。该设计实现了反射系数\(\:\left({\text{S}}_{11}\right)\)为-26 dB,吸收值为99% at a working frequency of 2.4 GHz, independent of polarization direction. The voltage rectifier circuit is designed using Advanced Design System (ADS) software, and it achieves an efficiency of 73% for 5 dBm input power at 2.4 GHz. The designed metamaterial absorber structure and rectification circuit have been fabricated in the laboratory, and the simulation and fabrication results are consistent. The energy harvesting system presented in this study can generate electrical energy to power low-power Internet of Things (IoT) devices at a voltage of 1.9 V DC.
期刊介绍:
Analog Integrated Circuits and Signal Processing is an archival peer reviewed journal dedicated to the design and application of analog, radio frequency (RF), and mixed signal integrated circuits (ICs) as well as signal processing circuits and systems. It features both new research results and tutorial views and reflects the large volume of cutting-edge research activity in the worldwide field today.
A partial list of topics includes analog and mixed signal interface circuits and systems; analog and RFIC design; data converters; active-RC, switched-capacitor, and continuous-time integrated filters; mixed analog/digital VLSI systems; wireless radio transceivers; clock and data recovery circuits; and high speed optoelectronic circuits and systems.